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DE9409484U1 - Vena cava thrombus filter - Google Patents

Vena cava thrombus filter

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Publication number
DE9409484U1
DE9409484U1 DE9409484U DE9409484U DE9409484U1 DE 9409484 U1 DE9409484 U1 DE 9409484U1 DE 9409484 U DE9409484 U DE 9409484U DE 9409484 U DE9409484 U DE 9409484U DE 9409484 U1 DE9409484 U1 DE 9409484U1
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Prior art keywords
catheter
vena cava
filter element
guide
wire
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Expired - Lifetime
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DE9409484U
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German (de)
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Priority to DE9409484U priority Critical patent/DE9409484U1/en
Publication of DE9409484U1 publication Critical patent/DE9409484U1/en
Priority to PCT/EP1995/002244 priority patent/WO1995034254A1/en
Priority to US08/750,517 priority patent/US5720764A/en
Priority to DE59503357T priority patent/DE59503357D1/en
Priority to ES95923292T priority patent/ES2123258T3/en
Priority to DK95923292T priority patent/DK0765144T3/en
Priority to AT95923292T priority patent/ATE170071T1/en
Priority to EP95923292A priority patent/EP0765144B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/01—Filters implantable into blood vessels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/01—Filters implantable into blood vessels
    • A61F2/011—Instruments for their placement or removal
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/01—Filters implantable into blood vessels
    • A61F2002/016—Filters implantable into blood vessels made from wire-like elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A61F2230/0006—Rounded shapes, e.g. with rounded corners circular
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0071—Three-dimensional shapes spherical

Landscapes

  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Networks Using Active Elements (AREA)
  • Eye Examination Apparatus (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • External Artificial Organs (AREA)

Abstract

PCT No. PCT/EP95/02244 Sec. 371 Date Dec. 11, 1996 Sec. 102(e) Date Dec. 11, 1996 PCT Filed Jun. 10, 1995 PCT Pub. No. WO95/34254 PCT Pub. Date Dec. 21, 1995A vena cava thrombus filter includes a catheter for insertion in a vein including a tube of flexible plastic and a guiding and holding wire supported and axially displaceable in the tube. The distal end of the wire has a filter element formed of wires which are elastically expandable inside a vein, wherein, in a forwardly pushed position outside of the catheter insertion end, the wires can expand to form a basket through which liquid can flow. The catheter has at the handling end of the guiding and holding wire a handle, and a fitting closable to irrigation fluid provided with a bayonet lock for fastening the handle relative to the fitting. The fitting has a metallic guide sleeve, wherein the flexible tube of the catheter is pulled over the metallic guide sleeve. A flexible rubber or plastic sleeve is arranged over the metallic guide sleeve and the flexible tube pulled over the metallic guide sleeve.

Description

NADERLINGER, Eduard, 50127 Bergheim 11.06.1994NADERLINGER, Eduard, 50127 Bergheim 11.06.1994

9357593575

Vena-cava Thromben-FiLterVena cava thrombus filter

Die Erfindung betrifft einen Vena-cava Thromben-FiLter mit einem zum Einführen in eine Vene ausgebildeten Katheter.The invention relates to a vena cava thrombus filter with a catheter designed for insertion into a vein.

Die Indikation zum Einsatz eines Vena-cava-FiLters ergibt sich zwingend beispieLsweise bei ThromboLysen zur temporären Prophylaxe von LungenemboIien durch sich lösende Thromben bzw. Teile solcher Thromben.The indication for the use of a vena cava filter is mandatory, for example, in the case of thrombolysis for the temporary prophylaxis of pulmonary embolisms caused by dissolving thrombi or parts of such thrombi.

Bekannte Vorrichtungen, um derartige Thromben im Blutkreislauf aufzufangen und/oder zu entfernen, sind zumeist aus Kunststoff und können bei Belastung abknicken, wodurch ihre Funktion beeinträchtigt wird. Vielfach sind die bekannten Vena-Cava Thromben-Filter auch kompliziert in Aufbau und Handhabung.Known devices for catching and/or removing such thrombi in the bloodstream are usually made of plastic and can bend under stress, which impairs their function. The known vena cava thrombi filters are often also complicated in their structure and handling.

Der Erfindung Liegt die Aufgabe zugrunde, einen temporären Vena-cava Thromben-Filter mit einem zum Einführen in eine Vene ausgebildeten Katheter zu verbessern bzw. zur Verfugung zu stellen, mit welchem es gelingt, bei einer Thrombolyse, Thrombektomie oder Risikoschwangerschaft sich ablösende Thromben oder Teile davon aus dem Blutkreislauf auszufiLtern, um der Gefahr einer LungenemboIie sicher vorzubeugen. Der Filter soll dabei so beschaffen sein, daß mit ihm wahlweise ein Zugang über alle bekannten Zugänge, z. B. ArmvenenThe invention is based on the task of improving or making available a temporary vena cava thrombus filter with a catheter designed for insertion into a vein, with which it is possible to filter out thrombi or parts thereof that have become detached from the bloodstream during thrombolysis, thrombectomy or a high-risk pregnancy in order to reliably prevent the risk of a pulmonary embolism. The filter should be designed in such a way that it can be used to access via all known access points, e.g. arm veins.

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(&ngr;.-basilica, -brachialis, v.-jugularis, -subcLavia, -femoraLis) mögLich ist. Demnach soLL der Katheter wie ein Angiografiekatheter sehr dünn und flexibel sein und eine Liegedauer während der gesamten Lysezeit mögLich machen.(v.-basilica, -brachialis, v.-jugularis, -subclavian, -femoraLis) is possible. Accordingly, the catheter should be very thin and flexible like an angiography catheter and make it possible to remain in place for the entire lysis period.

Die Lösung der gestellten Aufgabe gelingt bei einem Vena-cava Thromben-Filter mit einem zum Einführen in eine Vene ausgebildeten Katheter mit der Erfindung dadurch, daß der Katheder ein dünnes Röhrchen aus flexiblem Kunststoff mit einem darin axial verschieblich gelagerten Führungs- und Haltedraht ist, dessen Handhabungsende einen Handgriff und dessen Einführungsende ein Filterelement aufweist, und daß das Filterelement aus dünnen, innerhalb einer Vene elastisch aufspreizbaren Drähten besteht, die in vorgeschobener Position außerhalb des Kaiheter-Einführendes die Form eines flüssigkeitsdurchlässigen Korbes aufweisen.The solution to the problem is achieved with a vena cava thrombus filter with a catheter designed for insertion into a vein with the invention in that the catheter is a thin tube made of flexible plastic with an axially displaceable guide and holding wire mounted therein, the handling end of which has a handle and the insertion end of which has a filter element, and in that the filter element consists of thin wires that can be elastically expanded within a vein and that, in the advanced position, have the shape of a fluid-permeable basket outside the catheter insertion end.

Mit großem Vorteil findet der Vena-Cava Thromben-Filter im geschlossenen Zustand mit durch Einzug in das Ende des Katheter-Röhrchens zusammengefalteten elastischen Drähten Zugang in alle wichtigen Venen und Venenstränge, wobei erst nach erfolgter und im Röntgenbild überprüfter Positionierung durch Betätigen des Führungs- und Haltedrahtes das eigentliche Filterelement aus dem Ende des Katheterrohrchen herausgeschoben und in die aufgespreizte Position versetzt wird. Dabei entfalten dann die elastisch aufspreizbaren Drähte das korbförmige Filterelement, welches geeignet ist, im Blutkreislauf flotierende Thromben oder Teile davon aufzuhalten bzw. einzufangen.The vena cava thrombus filter has great advantage in that it can access all important veins and venous branches when it is closed using elastic wires folded together by pulling them into the end of the catheter tube. Only after positioning has been carried out and checked in an X-ray image is the actual filter element pushed out of the end of the catheter tube and moved into the spread position by operating the guide and holding wire. The elastically spreadable wires then unfold the basket-shaped filter element, which is suitable for stopping or capturing thrombi or parts of them floating in the bloodstream.

Eine Ausgestaltung sieht vor, daß der Vena-Cava Thromben-Filter aus mehreren, bevorzugt aus acht bauchig inOne embodiment provides that the vena cava thrombus filter consists of several, preferably eight, bulbous

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HeLixform aufspannbaren Drähten von implanti erbarer MemorydrahtquaLitat mit 0,08 mm Durchmesser besteht.Helix-shaped wires of implantable memory wire quality with a diameter of 0.08 mm.

Weitere zweckmäßige Ausgestaltungen des Vena-cava Thromben-FiLters sind entsprechend den Unteransprüchen vo rgesehen.Further practical embodiments of the vena cava thrombus filter are provided in accordance with the subclaims.

Die Erfindung wird in schematischen Zeichnungen in einer bevorzugten Ausführungs form gezeigt, wobei aus den Zeichnungen weitere vorteilhafte Einzelheiten der Erfindung entnehmbar sind.The invention is shown in schematic drawings in a preferred embodiment, from which drawings further advantageous details of the invention can be taken.

Es ze i gen:Show it:

Fig. 1 in Seitenansicht einen Vena-cava Thromben-Fi lter mit ausgefahrenem, elastisch aufgespreiztem Fi Iterelement,Fig. 1 in side view a vena cava thrombus filter with extended, elastically spread filter element,

Fig. 2 in Frontansicht und teilweise im Schnitt den Thromben-Filter mit ausgefahrenem und aufgepreiztem Fi Lterelement,Fig. 2 in front view and partly in section the thrombus filter with extended and spread filter element,

Fig. 3 eine Seitenansicht des Thromben-FiLters mit in den Katheter eingefahrenem, zum Einführen in eine Vene vorgesehenem Zustand.Fig. 3 a side view of the thrombus filter retracted into the catheter, ready for insertion into a vein.

Der in Figur 1 gezeigte Vena-cava Thromben-Filter weist ein nach Einführung in eine Vene (40) aus dem Einführungsende (14) ausgefahrenes und nach Austritt aus dem Einführungsende (14) durch die Elastizität der dünnen, aufspreizbaren Drähte (31)The vena cava thrombus filter shown in Figure 1 has a after introduction into a vein (40) from the insertion end (14) and after exiting from the insertion end (14) due to the elasticity of the thin, expandable wires (31)

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in Form eines Korbes aufgespreiztes Filterelement (30) auf.filter element (30) spread out in the form of a basket.

Vor Verwendung des erfindungsgemäßen Vena-cava-FiLters wird zunächst eine SeLdingernadel in eine Armvene eingeführt, durch die ein kurzer Führungsdraht geschoben wird, wonach die Nadel über den Führungsdraht hinweg wieder entfernt wird. Danach wird eine handelsübliche 5 F-Schleuse in die Vene implantiert und der Führungsdraht mit Dilator herausgenommen. Durch die Schleuse wird nunmehr das Führungsende (14) des Katheters (10) bei eingezogenem Filterelement (30) in die Vene eingeschoben.Before using the vena cava filter according to the invention, a Seldinger needle is first inserted into an arm vein, through which a short guide wire is pushed, after which the needle is removed again over the guide wire. A commercially available 5 F sheath is then implanted into the vein and the guide wire with dilator is removed. The guide end (14) of the catheter (10) is now pushed through the sheath into the vein with the filter element (30) retracted.

Wie die Zusammenschau der Figuren 1 bis 3 zeigt, ist der Katheter (10) ein dünnes Röhrchen aus flexiblem Kunststoff mit einem darin axial verschieblich gelagerten Führungs- und Haltedraht (20). Am Handhabungsende (21) des Führungs- und Haltedrahtes (20) ist ein Handgriff (22) vorgesehen, mit dem das Filterelement (30) einziehbar oder aufspannbar ist. Durch Herausziehen bzw. Hineindrücken des Handgriffs (22) wird der Katheter (10) bewegt und das Filterelement (30) geschlossen oder geöffnet. So zeigen beispielsweise die Figuren 1 und 2 bei eingeschobenem Führungsdraht (20) das aus dem Katheterende (14) ausgefahrene und durch Elastizität der in Helixform aufspannbaren Drähte (31) in Form eines Korbes aufgespreizte Filterelement (30), während Figur 3 den eingezogenen Zustand zeigt, der sich bei herausgezogenem Handgriff (22) des Katheters (10) einstellt. Das Filterelement (30) hat im aufgespreizten Zustand die Funktion eines fLüssigkeitsdurchlassigen Siebes in Form eines Korbes (30). Es besteht aus mehreren, bevorzugt aus acht bauchig in Helixform aufspannbaren Drähten (31) von implantierbarer Memorydrahtqua Ii tat mit etwa 0,08 mm Durchmesser.As the overview of Figures 1 to 3 shows, the catheter (10) is a thin tube made of flexible plastic with a guide and holding wire (20) mounted axially displaceably therein. A handle (22) is provided at the handling end (21) of the guide and holding wire (20), with which the filter element (30) can be pulled in or stretched out. By pulling out or pushing in the handle (22), the catheter (10) is moved and the filter element (30) is closed or opened. For example, Figures 1 and 2 show the filter element (30) extended from the catheter end (14) with the guide wire (20) inserted and spread out in the form of a basket due to the elasticity of the wires (31) that can be stretched out in a helical shape, while Figure 3 shows the retracted state that occurs when the handle (22) of the catheter (10) is pulled out. In the spread out state, the filter element (30) has the function of a liquid-permeable sieve in the form of a basket (30). It consists of several, preferably eight, bulbous wires (31) that can be stretched out in a helical shape and are of implantable memory wire quality with a diameter of approximately 0.08 mm.

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Eine zweckmäßige Ausbildung sieht vor, daß am Ende des den Filter bildenden Drahtkorbes (30) eine Hülse (32) angeordnet ist, an der ein teflonierter Führungsdraht (23) mit einer J-Führungsdrahtspitze (33) befestigt ist.A suitable design provides that a sleeve (32) is arranged at the end of the wire basket (30) forming the filter, to which a Teflon-coated guide wire (23) with a J-guide wire tip (33) is attached.

Eine weitere zweckmäßige Ausgestaltung der Erfindung sieht vor, daß der Katheter (10) an dessen oberem Handhabungsende (11) über der metallischen FührungshüL se der Armatur (13) und dem darauf aufgezogenen Katheterröhrchen (10) mit einer flexiblen Gummi- oder Kunststoffhülse (12) abgedeckt ist. Die Armatur (13) ist für ein SpüLfluid verschließbar ausgebildet. Weiterhin weist die Armatur (13) Mittel (15) auf, an welchen der Handgriff (22) des Führungs- und Haltedrahtes (20) mit einem Bajonettverschluß (24) festlegbar ist.A further expedient embodiment of the invention provides that the catheter (10) is covered at its upper handling end (11) with a flexible rubber or plastic sleeve (12) over the metal guide sleeve of the fitting (13) and the catheter tube (10) pulled onto it. The fitting (13) is designed to be closable for a flushing fluid. Furthermore, the fitting (13) has means (15) to which the handle (22) of the guide and holding wire (20) can be secured with a bayonet lock (24).

Um auch bei vergrößerten Venendurchmessern das Filterelement (30) sicher einsetzen zu können, weist dieses einen Durchmesser von ca. 35 mm und eine Länge von ca. 55 mm auf. Es ist jedoch ersichtlich, daß das Filterelement (30) wegen der außerordentlichen Elastizität seiner extrem dünnen Drähte (31) sich an jeden Venendurchmesser problemlos anpaßt und auch in sehr dünnen Venen einsetzbar ist, Besonders vorteilhaft kann es mittels einer handelsüblichen 5 F-Schleuse implantiert werden.In order to be able to use the filter element (30) safely even with larger vein diameters, it has a diameter of approx. 35 mm and a length of approx. 55 mm. However, it is clear that the filter element (30) adapts easily to any vein diameter due to the extraordinary elasticity of its extremely thin wires (31) and can also be used in very thin veins. It can be implanted particularly advantageously using a commercially available 5 F sheath.

Eine sichere Betätigung durch Herausziehen und Hineindrücken des Führungs- und Haltedrahtes (20) wird dadurch erreicht, daß der Draht (20) relativ zum umgebenden Katheter rohrchen (10) mit axialem Freigang (F) gemäß Fig. 3 ausgebildet ist und dieser zumindest der Länge (L) des aufgespreizten Filters (30) zuzüglich der Länge (L) der endständigen Hülse (32) einschließlich der teflonierten J-Führungsdrahtspitze (33)Safe operation by pulling out and pushing in the guide and holding wire (20) is achieved in that the wire (20) is designed with axial clearance (F) relative to the surrounding catheter tube (10) as shown in Fig. 3 and this clearance corresponds at least to the length (L) of the spread filter (30) plus the length (L) of the terminal sleeve (32) including the Teflon-coated J-guide wire tip (33)

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entspricht.corresponds.

0er erfindungsgemäß temporär anwendbare Vena-cava-FiIter erfüLlt mit der gezeigten Ausbildung alle Anforderungen für einen optimalen ThromboLyseschutz. Er ermöglicht wahlweisen Zugang über alle bekannten Zugänge wie z. B. Armvenen, ist sehr dünn, beispielsweise mit einem Außendurchmesser des Katheters von 1,5 bis 2 mm und extrem flexibel. Er ist für alle cava-Größen geeignet und kann auch in die v-lliaca gelegt werden. Weiterhin ermöglicht die Bauart und die durch den BajonettverschLuß (24) mögliche Feststellbarkeit eine Längere Liegedauer während einer Lysezeit, wobei auch noch die integrierte J-Führungsdrahtspitze ein sehr einfaches Legen ermöglicht.The vena cava filter which can be used temporarily according to the invention meets all the requirements for optimum thrombolysis protection with the design shown. It allows access via all known access points such as arm veins, is very thin, for example with an external diameter of the catheter of 1.5 to 2 mm, and is extremely flexible. It is suitable for all cava sizes and can also be placed in the v-iliaca. Furthermore, the design and the ability to fix it using the bayonet lock (24) enable it to be left in place for a longer period during a lysis period, and the integrated J-guide wire tip also makes it very easy to place it.

Insgesamt ergibt die erfindungsgemäße Ausbildung des Vena-Cava Thromben-Filters mit dem zum Einführen in eine Vene ausgebildeten Katheter eine optimale Lösung der eingangs gestellten Aufgabe.Overall, the inventive design of the vena cava thrombus filter with the catheter designed for insertion into a vein provides an optimal solution to the task posed at the beginning.

Claims (7)

11.06.1994 - 7 - 93575 Ansprüche11.06.1994 - 7 - 93575 Claims 1. Vena-Cava Thromben-FiLter mit einem zum Einführen in eine Vene (40) ausgebildeten Katheter C10), dadurch gekennzeichnet, daß der Katheter (10) ein dünnes Röhrchen aus fLexiblem Kunststoff mit einem darin axial verschiebLich gelagerten Führungs- und Haltedraht (20) ist, dessen Handhabungsende (21) einen Handgriff (22) und dessen Einführungsende (23) ein Filterelement (30) aufweist, und daß das Filterelement (30) aus dünnen, innerhalb einer Vene elastisch aufspreizbaren Drähten (31) besteht, die in vorgeschobener Position außerhalb des Katheter-Einführungsendes (14) die Form eines fLüssigkeitsdurchlassigen Korbes (30) aufweisen.1. Vena cava thrombus filter with a catheter (10) designed for insertion into a vein (40), characterized in that the catheter (10) is a thin tube made of flexible plastic with a guide and holding wire (20) mounted axially displaceably therein, the handling end (21) of which has a handle (22) and the insertion end (23) of which has a filter element (30), and that the filter element (30) consists of thin wires (31) which can be elastically spread within a vein and which, in the advanced position outside the catheter insertion end (14), have the shape of a fluid-permeable basket (30). 2. Vena-Cava Thromben-Filter nach Anspruch 1, dadurch gekennzeichnet, daß das Filterelement (30) aus mehreren, bevorzugt aus acht bauchig in Helixform aufspannbaren Drähten (31) von impLantierbarer Memorydrahtqualität mit 0,08 mm Durchmesser besteht.2. Vena cava thrombus filter according to claim 1, characterized in that the filter element (30) consists of several, preferably eight, bulbous wires (31) which can be stretched in a helical shape and are of implantable memory wire quality with a diameter of 0.08 mm. 3. Vena-Cava Thromben-Filter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß am Ende des das Filterelement bildenden Drahtkorbes (30) eine Hülse (32) aus Metall und an dieser ein teflonierter Führungsdraht (23) mit einer teflonierten J-Führungsdrahtspitze (33) angeordnet ist.3. Vena cava thrombus filter according to claim 1 or 2, characterized in that at the end of the wire basket (30) forming the filter element there is arranged a sleeve (32) made of metal and on this a Teflon-coated guide wire (23) with a Teflon-coated J-guide wire tip (33). 4. Vena-Cava Thromben-Filter nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Katheter (10) am oberen Handhabungsende (11) über einer metallischen Führungshülse an der für ein Spülfluid verschließbaren Armatur (13) und dem darauf aufgezogenen Katheterrohrchen (10) eine4. Vena Cava thrombus filter according to one or more of claims 1 to 3, characterized in that the catheter (10) at the upper handling end (11) has a metallic guide sleeve on the fitting (13) which can be closed for a flushing fluid and the catheter tube (10) pulled onto it. 11.06.1994 - 8 - 9357511.06.1994 - 8 - 93575 flexible Gummi- oder Kunststoffhülse (12) aufweist.flexible rubber or plastic sleeve (12). 5. Vena-Cava Thromben-Filter nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Armatur (13) Mittel (15) aufweist, an welchen der Handgriff (22) des Führungs- und Haltedrahtes (20) mit einem Bajonettverschluß festlegbar ist.5. Vena cava thrombus filter according to one or more of claims 1 to 4, characterized in that the fitting (13) has means (15) to which the handle (22) of the guide and holding wire (20) can be secured with a bayonet lock. 6. Vena-Cava Thromben-Filter nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das zur Form eines Korbes (30) aufspreizbare Filterelement einen Durchmesser von ca. 35 mm und eine Länge von ca. 55 mm aufweist.6. Vena cava thrombus filter according to one or more of claims 1 to 5, characterized in that the filter element which can be expanded to form a basket (30) has a diameter of approximately 35 mm and a length of approximately 55 mm. 7. Vena-Cava Thromben-Filter nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Führungsund Haltedraht (20) relativ zum umgebenden Katheterrohrchen (10) mit axialem Freigang (F) ausgebildet ist und dieser zumindest der Länge (L) des aufgesprei&zgr; ten Filterelementes (30) zuzüglich der Länge (D der endständigen Hülse (32) einschließlich der teflonierten J-Führungsdrahtspitze (33) entspricht.7. Vena cava thrombus filter according to one or more of claims 1 to 6, characterized in that the guide and holding wire (20) is designed with axial clearance (F) relative to the surrounding catheter tube (10) and this corresponds at least to the length (L) of the expanded filter element (30) plus the length (D) of the terminal sleeve (32) including the Teflon-coated J-guide wire tip (33).
DE9409484U 1994-06-11 1994-06-11 Vena cava thrombus filter Expired - Lifetime DE9409484U1 (en)

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Application Number Priority Date Filing Date Title
DE9409484U DE9409484U1 (en) 1994-06-11 1994-06-11 Vena cava thrombus filter
PCT/EP1995/002244 WO1995034254A1 (en) 1994-06-11 1995-06-10 Vena cava thrombus filter
US08/750,517 US5720764A (en) 1994-06-11 1995-06-10 Vena cava thrombus filter
DE59503357T DE59503357D1 (en) 1994-06-11 1995-06-10 Vena-cava thromben-filter
ES95923292T ES2123258T3 (en) 1994-06-11 1995-06-10 THROMBES FILTER IN VENA-CAVA.
DK95923292T DK0765144T3 (en) 1994-06-11 1995-06-10 Hollow vein thrombus filter
AT95923292T ATE170071T1 (en) 1994-06-11 1995-06-10 VENA-CAVA THROMB FILTER
EP95923292A EP0765144B1 (en) 1994-06-11 1995-06-10 Vena cava thrombus filter

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DE9409484U DE9409484U1 (en) 1994-06-11 1994-06-11 Vena cava thrombus filter

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DE59503357T Expired - Fee Related DE59503357D1 (en) 1994-06-11 1995-06-10 Vena-cava thromben-filter

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EP (1) EP0765144B1 (en)
AT (1) ATE170071T1 (en)
DE (2) DE9409484U1 (en)
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US5720764A (en) 1998-02-24
DE59503357D1 (en) 1998-10-01
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ATE170071T1 (en) 1998-09-15
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